I think it's made out of copper that rusts over the years.
The advantages of having green roofs on schools is that they are environmentally friendly. They absorb rainwater, provide animal habitats and provide insulation.
You'll find over a dozen roofing companies in Ottawa. Some of them include A1 Professional Roofing, Capital City Roofing, G.M. Towns Roofing Services, Rooftek Canada, and Roofmaster Ottawa.
This is copper's version of oxidisation. It occurs very visibly on buildings with copper trim on the roofs.
Green roofs are specially prepared for growing grass or other plants on them
broken buildings collapsed buildings roofs ect
Lots of the buildings were made of wood, stone or both. All of them had thatched roofs.
Can cause the roofs of buildings to collapse.
Green roofs are specially prepared for growing grass or other plants on them
Steven L. Cantor has written: 'Green Roofs in Sustainable Landscape Design' -- subject- s -: Green roofs - Gardening -, Design and construction 'Contemporary trends in landscape architecture' -- subject- s -: Landscape architecture 'Green roofs in landscape design' -- subject- s -: Green roofs - Gardening -, Design and construction
in roofs and eaves of buildings using mud and saliva.
Cheaper to build and maintain.